From af1a266670d040d2f4083ff309d732d648afba2a Mon Sep 17 00:00:00 2001
From: Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com>
Date: Tue, 10 Oct 2023 14:33:42 +0000
Subject: Add submodule dependency files
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
---
roms/u-boot/drivers/bootcount/bootcount_at91.c | 30 ++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
create mode 100644 roms/u-boot/drivers/bootcount/bootcount_at91.c
(limited to 'roms/u-boot/drivers/bootcount/bootcount_at91.c')
diff --git a/roms/u-boot/drivers/bootcount/bootcount_at91.c b/roms/u-boot/drivers/bootcount/bootcount_at91.c
new file mode 100644
index 000000000..c4ab5ceaf
--- /dev/null
+++ b/roms/u-boot/drivers/bootcount/bootcount_at91.c
@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/at91_gpbr.h>
+
+/*
+ * We combine the CONFIG_SYS_BOOTCOUNT_MAGIC and bootcount in one 32-bit
+ * register. This is done so we need to use only one of the four GPBR
+ * registers.
+ */
+void bootcount_store(ulong a)
+{
+ at91_gpbr_t *gpbr = (at91_gpbr_t *) ATMEL_BASE_GPBR;
+
+ writel((CONFIG_SYS_BOOTCOUNT_MAGIC & 0xffff0000) | (a & 0x0000ffff),
+ &gpbr->reg[AT91_GPBR_INDEX_BOOTCOUNT]);
+}
+
+ulong bootcount_load(void)
+{
+ at91_gpbr_t *gpbr = (at91_gpbr_t *) ATMEL_BASE_GPBR;
+
+ ulong val = readl(&gpbr->reg[AT91_GPBR_INDEX_BOOTCOUNT]);
+ if ((val & 0xffff0000) != (CONFIG_SYS_BOOTCOUNT_MAGIC & 0xffff0000))
+ return 0;
+ else
+ return val & 0x0000ffff;
+}
--
cgit